Example usage for java.io IOException IOException

Introduction

In this page you can find the example usage for java.io IOException IOException.

Prototype

public IOException(Throwable cause)

Source Link

Document

Constructs an IOException with the specified cause and a detail message of (cause==null ?

Usage

From source file:Main.java

private static byte[] getSHA1Digest(String data) throws IOException {
    byte[] bytes = null;
    try {/*from  ww w . j  a  v  a  2  s  .c  o m*/
        MessageDigest md = MessageDigest.getInstance("SHA-1");
        bytes = md.digest(data.getBytes("UTF-8"));
    } catch (GeneralSecurityException gse) {
        throw new IOException(gse);
    }
    return bytes;
}

From source file:Main.java

/**
 * Determine whether a file is a ZIP File.
 *///from  w w  w .  j  ava 2 s  . c  o  m
public static boolean isZipFile(File file) throws IOException {
    if (file.isDirectory()) {
        return false;
    }
    if (!file.canRead()) {
        throw new IOException("Cannot read file " + file.getAbsolutePath());
    }
    if (file.length() < 4) {
        return false;
    }
    DataInputStream in = new DataInputStream(new BufferedInputStream(new FileInputStream(file)));
    int test = in.readInt();
    in.close();
    return test == 0x504b0304;
}

From source file:Main.java

static public String prepareFilePath(String fileName, String dir) throws IOException {
    File dictionaryRoot = new File(Environment.getExternalStorageDirectory(), dir);
    File dictionaryDirFile = new File(dictionaryRoot, fileName.substring(0, 1));
    if (!dictionaryDirFile.exists()) {
        if (!dictionaryDirFile.mkdirs()) {
            throw new IOException("Cannot create directory: " + dictionaryDirFile);
        }/*from ww  w . j av  a 2 s.  co  m*/
    }
    return new File(dictionaryDirFile, fileName + ".mp3").getCanonicalPath();
}

From source file:Main.java

public static void writeFile(File file, byte[] content) throws IOException {
    if (!file.exists()) {
        try {//from  w w  w  .jav  a  2 s  .  co m
            file.createNewFile();
        } catch (IOException e) {
            throw new IOException("not crete file=" + file.getAbsolutePath());
        }
    }
    FileOutputStream fileOutputStream = null;
    ByteArrayInputStream bis = null;
    try {
        bis = new ByteArrayInputStream(content);
        fileOutputStream = new FileOutputStream(file, false);
        byte[] buffer = new byte[1024];
        int length = 0;
        while ((length = bis.read(buffer)) != -1) {
            fileOutputStream.write(buffer, 0, length);
        }
        fileOutputStream.flush();
    } finally {
        if (fileOutputStream != null) {
            fileOutputStream.close();
        }
        if (bis != null) {
            bis.close();
        }
    }
}

From source file:Main.java

public static byte[] readBytes(File file) throws IOException {
    //check/*from w w w  .  ja v  a 2  s  .co m*/
    if (!file.exists()) {
        throw new FileNotFoundException("File not exist: " + file);
    }
    if (!file.isFile()) {
        throw new IOException("Not a file:" + file);
    }

    long len = file.length();
    if (len >= Integer.MAX_VALUE) {
        throw new IOException("File is larger then max array size");
    }

    byte[] bytes = new byte[(int) len];
    FileInputStream in = null;
    try {
        in = new FileInputStream(file);
        in.read(bytes);
    } finally {
        close(in);
    }

    return bytes;
}

From source file:Main.java

public static byte[] readFile(File file) throws IOException {
    // Open file//from w  ww.j a va 2 s  . c  o  m
    RandomAccessFile f = new RandomAccessFile(file, "r");
    try {
        // Get and check length
        long longlength = f.length();
        int length = (int) longlength;
        if (length != longlength)
            throw new IOException("File size >= 2 GB");
        // Read file and return data
        byte[] data = new byte[length];
        f.readFully(data);
        return data;
    } finally {
        f.close();
    }
}

From source file:Main.java

/**
 * Load a DOM document//from   ww w  .  ja v a 2s.com
 */
public static Document loadDocument(InputStream in) throws IOException {
    try {
        DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
        return builder.parse(in);
    } catch (ParserConfigurationException e) {
        throw new IOException(e.getMessage());
    } catch (SAXException e) {
        throw new IOException(e.getMessage());
    }
}

From source file:Main.java

/**
 * Decodes HEX representation of the string.
 *
 * @param data HEX//from w  ww.  j a v  a 2 s. com
 * @return String representation of the {@code data}
 * @throws IOException if some error occurs
 */
private static String decodeHex(String data) throws IOException {
    if (data == null || data.isEmpty()) {
        return data;
    }
    if (data.length() % 2 != 0) {
        throw new IOException("String is not in hexadecimal representation.");
    }
    byte[] bytes = new byte[data.length() / 2];
    for (int i = 0; i < data.length(); i += 2) {
        bytes[i / 2] = Integer.valueOf(data.substring(i, i + 2), 16).byteValue();
    }
    return new String(bytes, "UTF-8");
}

From source file:Utils.java

/**
 * delete all files under this file and including this file
 * /*from   w w  w. j  a v  a2s.c  o m*/
 * @param f
 * @throws IOException
 */
public static void deleteAll(File f) throws IOException {
    recurse(f, new RecurseAction() {
        public void doFile(File file) throws IOException {
            file.delete();
            if (file.exists()) {
                throw new IOException("Failed to delete  " + file.getPath());
            }
        }

        public void doBeforeFile(File f) {
        }

        public void doAfterFile(File f) {
        }
    });
}

From source file:Main.java

public static void unzip(InputStream is, String dir) throws IOException {
    File dest = new File(dir);
    if (!dest.exists()) {
        dest.mkdirs();/* www .  j a  va2s . c o m*/
    }

    if (!dest.isDirectory())
        throw new IOException("Invalid Unzip destination " + dest);
    if (null == is) {
        throw new IOException("InputStream is null");
    }

    ZipInputStream zip = new ZipInputStream(is);

    ZipEntry ze;
    while ((ze = zip.getNextEntry()) != null) {
        final String path = dest.getAbsolutePath() + File.separator + ze.getName();

        String zeName = ze.getName();
        char cTail = zeName.charAt(zeName.length() - 1);
        if (cTail == File.separatorChar) {
            File file = new File(path);
            if (!file.exists()) {
                if (!file.mkdirs()) {
                    throw new IOException("Unable to create folder " + file);
                }
            }
            continue;
        }

        FileOutputStream fout = new FileOutputStream(path);
        byte[] bytes = new byte[1024];
        int c;
        while ((c = zip.read(bytes)) != -1) {
            fout.write(bytes, 0, c);
        }
        zip.closeEntry();
        fout.close();
    }
}